Liquid Silicone Rubber Molding Services

Get custom silicone parts within 15 days. We use aluminum molds that offer cost-efficient tooling and accelerated manufacturing cycles, and stock various grades and durometers of LSR materials.

Liquid Silicone Rubber Molding Services

LSR Molding Capabilities

Our basic guidelines include important design considerations to help improve part moldability, enhance cosmetic appearance, and reduce production time.

Specifications

Size Limit
12 in. x 8 in. x 4 in.
304.88mm x 203.2mm x 101.6mm
Volume
13.3 cu. in.
217,948 cu. mm
Depth
No greater than 2 in. from any parting line
No greater than 50.88mm from any parting line
Projected Mold Area
48 sq. in.
30,968 sq. mm

Tolerances

Machining Tolerance
±0.003 in. (0.08mm)
Linear Tolerance
±0.025 in./in. (0.025mm/mm)

LSR Material Options

We offer various grades of liquid silicone rubber materials to meet different application requirements:

Standard Silicone

Durometer Grades:
30 Shore A40 Shore A50 Shore A60 Shore A70 Shore A
  • Excellent Elasticity
  • Temperature Resistance
  • Biocompatibility

Medical Grade

  • FDA Compliant
  • USP Class VI Certified
  • Biocompatible
  • Sterilizable

Optical Grade

  • High Transparency
  • Low Yellowing
  • Optical Applications

Fluorosilicone

  • Fuel Resistant
  • Oil Resistant
  • Automotive Applications

Applications

LSR molding technology is widely used in the following sectors:

Medical Devices

  • Medical Seals
  • Catheters
  • Respiratory Masks
  • Baby Care Products

Automotive

  • Sealing Rings
  • Dampers
  • Electronic Protection
  • Keypads

Consumer Electronics

  • Waterproof Seals
  • Buttons
  • Protective Cases
  • Cushions

Industrial Equipment

  • Seals
  • Gaskets
  • Shock Absorbers
  • Protective Covers

LSR Molding Process

Our LSR molding process ensures high-quality product output:

1

Design Optimization

Provide DFM analysis and recommendations to ensure manufacturability

2

Mold Making

CNC machining of high-temperature aluminum molds for LSR process

3

Material Preparation

Select appropriate LSR material and durometer based on application

4

Injection Molding

Use specialized LSR equipment with precise shot control

5

Post Processing

Manual part removal and necessary finishing and inspection

Quality Control

We provide comprehensive quality inspection services:

Design for Manufacturability (DFM)

Complete manufacturability analysis before production

Scientific Molding Process Report

Document and optimize key process parameters

In-Process CMM Inspection

Real-time monitoring of critical dimensions

First Article Inspection (FAI)

Process capability report with GD&T

Surface Finish Options

PM-F0

Non-cosmetic, finish to factory discretion

PM-F1

Low-cosmetic, most toolmarks removed

PM-F2

Non-cosmetic, EDM permissible

SPI-C1

600 grit stone, 10-12 Ra

PM-T1

SPI-C1 + light bead blast

PM-T2

SPI-C1 + medium bead blast

SPI-B1

600 grit paper, 2-3 Ra

SPI-A2

Grade #2 diamond buff, 1-2 Ra

Start Your LSR Project

Contact our expert team for free quotation and professional technical consultation. We look forward to partnering with you to create excellent products together.

Partsproto

Professional CNC machining and custom parts manufacturing services, meeting your precision machining needs with rapid delivery of high-quality components.

Contact Us

  • Email: [email protected]
  • Address: 11 Longjiangyi Rd, Dong Guan Shi, Guangdong Province, China, 523690

© 2025 Partsproto | All rights reserved.